import React from 'react';
import ReactGantt from 'gantt-for-react';
 
<ReactGantt
  tasks={this.getTasks()}
  viewMode={this.state.viewMode}
  onClick={this._func}
  onDateChange={this._func}
  onProgressChange={this._func}
  onViewChange={this._func}
  customPopupHtml={this._html_func}
/>